Tool

Calculate the cost-effectiveness.
Please use this if you want to know which is the cheapest item among multiple items.

Draw lots randomly from any list.
You can also decide the order and group (team).

Generate random numbers in any range. Use it even when you need dice.
You can also sort the results in ascending order, hide them and show them one by one with a click.

A simple click counter that you can use when you want to count numbers quickly.
It can count negative numbers and create multiple counters.

Calculate the amounts.
Use it to calculate ingredients for cooking recipes, etc.

Randomly generate strong passwords. If you have trouble thinking of passwords, this is a good option for you.
Password length is more important than complexity. The generation process is done locally and not sent to the server.

Generate huge ASCII art of any size from any text or image file.
You can also create huge ASCII art with emojis and even rotated or flipped huge ASCII art.

Generate braille ASCII art from any text or image file.
You can also create rotated or flipped braille ASCII art.

Generate ASCII art with decorated text.

Convert between normal and special characters. Only alphabet and digit characters are supported.
Please note that using special characters may make it difficult to search with search engines.

Convert Japanese hiragana and katakana to Hepburn romanization.
You can also reverse conversion from Hepburn romanization to Japanese hiragana.

Convert Japanese hiragana and katakana to Kunrei-shiki romanization.
You can also reverse conversion from Kunrei-shiki romanization to Japanese hiragana.

Interconvert between space separated, camel case, pascal case, snake case and kebab case.

This is a string generation tool (for developers) that may be useful for checking the length of strings.
It is mainly used to create test data for string checking of input values. Feel free to use it.

Convert JSON and YAML to each other.
The conversion is done locally. It is not sent to the server.

Format JSON text into a readable format (Pretty Print / Beautify).
Formatting is done locally. It is not sent to the server.

Calculate hash values (message digests) using various hash algorithms.
HMAC hash values can also be calculated.

Parse the structure of the URL and display the components of the URL, query parameters, etc.
It is used to check the structure of long URL.

Convert (encode / decode) using the URL encoding (Percent-encoding) method.

List and compare major fonts.
This is a font comparison tool for finding the font you want.

Create dummy images that can be used for mock-ups, etc.
Can be created in PNG, WebP, JPEG, GIF, or SVG format.

Convert images in PNG, WebP, JPEG, GIF, or BMP format to images in ICO format (also known as "favicon.ico" format).
It is also possible to create a single ".ico" file that contains images of multiple sizes (multiple-icon).

You can check the Exif info (thumbnail, shooting date, shooting location, camera, software, etc.) embedded in the JPEG image.
You can also delete the Exif info.

Generate a QR code from any text. You can also use emojis etc.
Use it when you have trouble entering long URLs or large amounts of text.

Convert (encode/decode) data URIs. You can also convert files other than images.
If you use the URI incorrectly, it loses its advantage and becomes counterproductive, so be careful when using it.

Convert (encode / decode) text or files in Base64 format.

Convert (encode / decode) text or files in Quoted-printable format.

You can calculate the difference between two times and add times.
Use this when you want to find out how much time has passed.

Convert any time to a specific format and any time zone.
You can convert to the local time of major cities around the world.

Displays the current local time in major cities around the world.
Daylight saving time display is also supported.

Randomly combine two words to create a new name.
Use it when you have trouble thinking of an account name or other name.

Performs fraction calculations.
You can use numbers (integers or decimals), fractions, and mixed numbers.

Automatically generate English drills and math drills that can be used for basic study.
It can also be displayed on flashcards.